EFFECTS OF REPEATEDLY HEADING A SOCCER BALL ON SERUM LEVELS OF TWO NEUROTROPHIC FACTORS OF BRAIN TISSUE, BDNF AND NGF, IN PROFESSIONAL SOCCER PLAYERS
Journal Title: Biology of Sport - Year 2011, Vol 28, Issue 3
Abstract
The present study determined the effects of heading training on serum nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) levels in soccer players. Seventeen professional level male soccer players (mean ± SD), age 24 ± 4.4 years, were recruited from a 3rd league team. Each player completed 15 approved headings in about 20-25 minutes. Venous blood samples were obtained from soccer players before and after the heading training for analysis. Levels of NGF and BDNF in the serum were determined by a commercially available enzyme-linked immunosorbent assay (ELISA) kit. Mean ± SD serum NGF levels were 18.71 ± 3.36 pg·ml-1 before training and 31.41 ± 7.89 pg·ml-1 after training (p=0.000). Mean ± SD serum BDNF levels were 22.32 ± 3.62 pg·ml-1 before training and 55.41 ± 12.59 pg·ml-1 after training (p=0.000). In this study heading a soccer ball was found to cause an increase in serum concentrations of NGF and BDNF. We suggest that the microtrauma caused by repetitive heading and/or the course of survival of the injured neurons may lead to increased NGF and BDNF levels.
Authors and Affiliations
B. Bamac, G. S. Tamer, T. Colak, E. Colak, C. Duman, S. Colak, A. Ozbek
Keywords
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